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56 lines
1.2 KiB
Plaintext
56 lines
1.2 KiB
Plaintext
---
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id: update
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title: 'Modify data: update()'
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slug: /update
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custom_edit_url: https://github.com/supabase/supabase/edit/master/spec/supabase_dart_v1_legacy.yml
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---
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import Tabs from '@theme/Tabs'
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import TabItem from '@theme/TabItem'
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Performs an UPDATE on the table.
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```dart
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final res = await supabase
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.from('cities')
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.update({ 'name': 'Middle Earth' })
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.match({ 'name': 'Auckland' })
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.execute();
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```
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## Notes
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- `update()` should always be combined with [Filters](/docs/reference/dart/using-filters) to target the item(s) you wish to update.
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## Examples
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### Updating your data
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```dart
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final res = await supabase
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.from('cities')
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.update({ 'name': 'Middle Earth' })
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.match({ 'name': 'Auckland' })
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.execute();
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```
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### Updating JSON data
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Postgres offers a
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[number of operators](https://www.postgresql.org/docs/current/functions-json.html)
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for working with JSON data. Right now it is only possible to update an entire JSON document,
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but we are [working on ideas](https://github.com/PostgREST/postgrest/issues/465) for updating individual keys.
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```dart
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final res = await supabase
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.from('users')
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.update({
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'address': {
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'street': 'Melrose Place',
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'postcode': 90210
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}
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})
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.eq('address->postcode', 90210)
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.execute();
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```
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